ok i have a pontiac gand prix 1992 , has a 3100 V6 3.1L engine , now the problem is my check engine light is allways on , but recently my spedometer will go all the way up to 125 Mph sometimes it would just dial 20 mph above my current speed , its a analog display , all electricall systems will turn off and on fast and briefly ( radio will lose programing ,strange ) and as the last week It would BLOW THE INJECTOR fuse ! so i would have to open the hood and re place it ... any ideas
im gona cheek all the wireing to see , and also a year a go it would have a Ecces voltage warning ,, does this car have a voltage regulator , cuz i thought it was in the alternator for this car , if no then were is it , so i can change it to see , any hellp would greatly be apreciated , Thanks